LTC2634IMSE-LZ8#PBF

Overview

The LTC2634IMSE-LZ8#PBF is a quad 8-bit voltage output digital-to-analog converter (DAC) in a 10-lead MSOP package. It features an integrated precision reference providing a 2.5V full-scale output with a temperature coefficient of 10ppm/°C. The device operates from a single 2.7V to 5.5V supply and includes rail-to-rail output buffers that are guaranteed monotonic over the -40°C to 85°C industrial temperature range. Communication is handled via a 3-wire SPI/MICROWIRE compatible interface supporting clock rates up to 50MHz. Upon power-up, the outputs reset to zero-scale.

Feature Summary

• Quad 8-bit DACs with integrated 2.5V precision reference (10ppm/°C)
• Rail-to-rail output buffers guaranteed monotonic from -40°C to 85°C
• Power-on reset to zero-scale for consistent system initialization
• 3-wire serial interface (SPI/MICROWIRE) with SCK up to 50MHz

Applications

• Mobile communications
• Process control and industrial automation
• Automatic test equipment
• Portable equipment

Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free construction compliant with RoHS standards. Confirm the IMSE designation corresponds to the Industrial temperature grade (-40°C to 85°C) and the MSE package type (10-lead MSOP). Ensure the LZ8 suffix matches the required 8-bit resolution and zero-scale power-on reset configuration.

Selection Notes

Select this component when four independent 8-bit channels are required with low cost and moderate accuracy. The internal 2.5V reference simplifies design by eliminating external reference components. Choose the LZ variant if a known zero-voltage state at power-up is critical for downstream circuit protection or initialization logic.

Part Context

This part belongs to the LTC2634 family, which offers 12-, 10-, and 8-bit resolutions in both QFN and MSOP packages. The IMSE-LZ8#PBF specifically denotes the Industrial grade, 8-bit resolution, zero-scale reset, and MSOP packaging within this broader product line.

Replacement Considerations

Direct replacements within the same family include LTC2634IMSE-LMI8#PBF (mid-scale reset) or LTC2634IMSE-HZ8#PBF (4.096V full-scale). Cross-package equivalents like the QFN version require schematic and layout modifications due to pinout differences.